CN106972839A - A kind of system for adjusting crystal oscillator frequency - Google Patents
A kind of system for adjusting crystal oscillator frequency Download PDFInfo
- Publication number
- CN106972839A CN106972839A CN201710299275.3A CN201710299275A CN106972839A CN 106972839 A CN106972839 A CN 106972839A CN 201710299275 A CN201710299275 A CN 201710299275A CN 106972839 A CN106972839 A CN 106972839A
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- frequency
- crystal oscillator
- pin
- keyboard
- frequency modulator
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- 239000013078 crystal Substances 0.000 title claims abstract description 58
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 3
- 230000007423 decrease Effects 0.000 claims description 3
- 238000004088 simulation Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 5
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H3/00—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators
- H03H3/007—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks
- H03H3/02—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks for the manufacture of piezoelectric or electrostrictive resonators or networks
- H03H3/04—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks for the manufacture of piezoelectric or electrostrictive resonators or networks for obtaining desired frequency or temperature coefficient
Abstract
The invention discloses a kind of system for adjusting crystal oscillator frequency, including：Keyboard, frequency modulator and by frequency modulation crystal oscillator, the keyboard is connected with frequency modulator, and frequency modulator is connected with by frequency modulation crystal oscillator, the keyboard, frequency modulator and by frequency modulation crystal oscillator formation one circuit loop, specifically, passing through keyboard, change frequency modulator output voltage, to adjust crystal oscillator frequency.The present invention is by way of touching key, and frequency modulator can be easy to use with the frequency of the active crystal oscillator of on-line fine, and frequency precision is high, and has highly reliable, high stability, and small volume, super low-power consumption are easy to the debugging and maintenance of whole system.
Description
Technical field
It is main to use the present invention relates to instrument and equipment technical field, more particularly to a kind of system for adjusting crystal oscillator frequency
In space flight and aviation precision instrument and equipment.
Background technology
Active crystal oscillator is mainly used in the main signal generator that shakes inside sensitive instrument and equipment.It is right in field of aerospace
The frequency precision of active crystal oscillator requires very high, in order to reach that this is required, at present by changing the outer meeting resistance of active crystal oscillator
To finely tune frequency.But.In order to reach the frequency precision of active crystal oscillator, in the circuit board repeatedly change resistance exist with
Lower defect：First, the ideal frequency that resistance also is difficult to reach active crystal oscillator is changed repeatedly in the circuit board, frequency precision is not
It is high.Secondly, resistance is changed repeatedly can also influence quality or the damage of wiring board.Again, energy and time is expended during system debug.
Finally, it is unfavorable for the maintenance of active the circuitry of crystal oscillator plate or system.
To sum up, the development with military industry and civil-military inosculation, it is a kind of for adjusting crystal oscillator frequency in the urgent need to researching and developing
System, to meet the demand to high accuracy and the active crystal oscillator of high stable.
The content of the invention
For the shortcoming of above-mentioned prior art, it can be used for adjusting active crystal oscillator frequency it is an object of the invention to provide a kind of
System, the existing frequency precision finely tuned frequency by changing the outer meeting resistance of active crystal oscillator and existed of solution is not high, influence
The quality of wiring board or damage, expend energy and time, be unfavorable for the problems such as active the circuitry of crystal oscillator plate or system maintenance.
In order to solve the above-mentioned technical problem, the present invention is adopted the following technical scheme that：
A kind of system for adjusting crystal oscillator frequency, including：Keyboard, frequency modulator and by frequency modulation crystal oscillator, the keyboard with
Frequency modulator is connected, and frequency modulator is connected with by frequency modulation crystal oscillator, the keyboard, frequency modulator and forms a circuit loop by frequency modulation crystal oscillator,
Specifically, by keyboard, changing frequency modulator output voltage, to adjust crystal oscillator frequency.
The described system for adjusting crystal oscillator frequency, includes the connection socket of external connection keyboard, the external connection keyboard
Connection socket is connected with frequency modulator.
The connection socket of the external connection keyboard includes six pins, and first pin connects positive supply, and the second pin allows
Address latch, three-prong be lifting key, the 4th pin for decline key, it is described second and third, four pins respectively with frequency modulator connect
Connect, the 5th pin is directly grounded.
The frequency modulator includes eight pins, and first pin connects positive supply, and the second pin is reference data voltage, and
It is connected with by frequency modulation crystal oscillator, three-prong output fm voltage signal is simultaneously connected with by frequency modulation crystal oscillator, electric on the basis of the 4th pin
The simulation of pressure, the 5th pin ground connection, the 6th pin is connected with external connection keyboard under the 4th pin connection of socket, fm voltage
Drop, the 7th pin is connected the three-prong connection of socket with external connection keyboard, and fm voltage rises, and the 8th pin connects with external connection keyboard
The second pin connection of combination hub, deposits effective fm voltage.
The frequency modulator includes touching, Schmidt circuit, logical-sequential control device, data register, memory and tune
Frequency voltage generator, the Schmidt circuit is connected with logical-sequential control device, logical-sequential control device respectively with data register
Device and memory connection, the data register are connected with memory, and the data register is connected with fm voltage generator.
The memory is band EEPROM EEPROM.
The operating temperature of the frequency modulator is -40 DEG C to 125 DEG C.
Compared with prior art, the present invention is by way of touching key, and frequency modulator can be with the frequency of the active crystal oscillator of on-line fine
Rate, easy to use, frequency precision is high, and has highly reliable, high stability, and small volume, super low-power consumption are easy to the tune of whole system
Examination and maintenance.
The technique effect of the design of the present invention, concrete structure and generation is described further below with reference to accompanying drawing, with
It is fully understood from the purpose of the present invention, feature and effect.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, makes required in being described below to embodiment
Accompanying drawing is briefly introduced, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this
For the those of ordinary skill in field, without having to pay creative labor, it can also be obtained according to these accompanying drawings
His accompanying drawing.
Fig. 1：The present invention is used for the system structure diagram for adjusting crystal oscillator frequency；
Fig. 2：The present invention is used for the system operating circuit schematic diagram for adjusting crystal oscillator frequency；
Fig. 3：Frequency modulator of the present invention constitutes structural representation.
Embodiment
In order that the object, technical solutions and advantages of the present invention are clearer, below in conjunction with accompanying drawing the present invention is made into
One step it is described in detail, it is clear that described embodiment is only embodiment of the invention a part of, rather than whole implementation
Example.Based on the embodiment in the present invention, what those of ordinary skill in the art were obtained under the premise of creative work is not made
All other embodiment, belongs to the scope of protection of the invention.
The embodiment of the present invention is described in further detail with reference to Figure of description.
As shown in figure 1, a kind of system for adjusting crystal oscillator frequency that the present invention is provided, including：Keyboard, frequency modulator and
By frequency modulation crystal oscillator, the keyboard is connected with frequency modulator, and frequency modulator is connected with by frequency modulation crystal oscillator, the keyboard, frequency modulator and is adjusted
Frequency crystal oscillator one circuit loop of formation, specifically, by keyboard, changing frequency modulator output voltage, to adjust crystal oscillator frequency.
The embodiment of the present invention declined by keypad/and lifting key can change the amplitude of frequency modulator output voltage, to reach
Adjust the purpose of crystal oscillator frequency.The present invention is by way of touching key, and frequency modulator can be made with the frequency of the active crystal oscillator of on-line fine
With convenient, frequency precision is high, and has a highly reliable, high stability, small volume, super low-power consumption, be easy to whole system debugging and
Safeguard.
In implementation, the system of the present invention for adjusting crystal oscillator frequency includes the connection socket of external connection keyboard, institute
The connection socket for stating external connection keyboard is connected with frequency modulator.It is preferred that, frequency modulator encapsulation is the double vertical straight cuttings of 8 pin, the company of external connection keyboard
Combination hub is single vertical straight cutting.
Specifically, as shown in Fig. 2 U1 is frequency modulator, P1 is the connection socket of external connection keyboard, C1, C2, C3, C4 are filtering
Electric capacity, U2 is by frequency modulation crystal oscillator.The connection socket of the external connection keyboard includes six pins, and first pin connects positive supply,
Second pin allow frequcny modulation data latch, three-prong be lifting key, the 4th pin for decline key, it is described second and third, four pins
It is connected respectively with frequency modulator, the 5th pin is directly grounded.
The frequency modulator includes eight pins, and first pin connects positive supply, and the second pin is reference data voltage, and
It is connected with by frequency modulation crystal oscillator, three-prong output fm voltage signal is simultaneously connected with by frequency modulation crystal oscillator, electric on the basis of the 4th pin
The simulation of pressure, the 5th pin ground connection, the 6th pin is connected with external connection keyboard under the 4th pin connection of socket, fm voltage
Drop, the 7th pin is connected the three-prong connection of socket with external connection keyboard, and fm voltage rises, and the 8th pin connects with external connection keyboard
The second pin connection of combination hub, deposits effective fm voltage.
Optionally, as shown in figure 3, frequency modulator of the present invention includes touching, Schmidt circuit, logical-sequential control device, data
Register, memory and fm voltage generator, the Schmidt circuit are connected with logical-sequential control device, logical sequence control
Device processed is connected with data register and memory respectively, and the data register is connected with memory, the data register with
Fm voltage generator is connected.It is preferred that, the memory is band EEPROM EEPROM.
The embodiment of the present invention, is declined by keypad/lifting key can change frequency modulator output voltage Vc amplitude, with up to
To the purpose of adjustment crystal oscillator frequency.Meanwhile, by pressing storage key, effective fm voltage correction value is saved in EEPROM.
In specific implementation, the operating temperature of frequency modulator of the present invention is -40 DEG C to 125 DEG C.
To sum up, active crystal oscillator of the invention is mainly used in the main signal generator that shakes inside sensitive instrument and equipment, and frequency modulator exists
Line finely tunes active crystal oscillator frequency, easy to use, and frequency precision is high, and the highly reliable, high stability of tool, small volume, super low-power consumption,
It is easy to the debugging and maintenance of whole system.
, but those skilled in the art once know basic creation although preferred embodiments of the present invention have been described
Property concept, then can make other change and modification to these embodiments.So, appended claims are intended to be construed to include excellent
Select embodiment and fall into having altered and changing for the scope of the invention.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (7)
1. a kind of system for adjusting crystal oscillator frequency, it is characterised in that including：Keyboard, frequency modulator and by frequency modulation crystal oscillator, institute
State keyboard to be connected with frequency modulator, frequency modulator is connected with by frequency modulation crystal oscillator, the keyboard, frequency modulator and by frequency modulation crystal oscillator formation one electricity
Road loop, specifically, by keyboard, changing frequency modulator output voltage, to adjust crystal oscillator frequency.
2. the system according to claim 1 for adjusting crystal oscillator frequency, it is characterised in that：Also include the company of external connection keyboard
Combination hub, the connection socket of the external connection keyboard is connected with frequency modulator.
3. the system according to claim 2 for adjusting crystal oscillator frequency, it is characterised in that：The connection of the external connection keyboard
Socket includes six pins, and first pin connects positive supply, and the second pin allows address latch, and three-prong is lifting key,
4th pin for decline key, it is described second and third, four pins be connected respectively with frequency modulator, the 5th pin is directly grounded.
4. the system according to claim 3 for adjusting crystal oscillator frequency, it is characterised in that：The frequency modulator includes eight
Pin, first pin connects positive supply, and the second pin is reference data voltage, and is connected with by frequency modulation crystal oscillator, three-prong
Output fm voltage signal is simultaneously connected with by frequency modulation crystal oscillator, the simulation of voltage on the basis of the 4th pin, the 5th pin ground connection, the
Six pins are connected the 4th pin connection of socket with external connection keyboard, and fm voltage declines, and the 7th pin is connected with external connection keyboard to be inserted
The three-prong connection of seat, fm voltage rises, and the 8th pin is connected the second pin connection of socket with external connection keyboard, and storage has
Imitate fm voltage.
5. the system for adjusting crystal oscillator frequency according to claim 1 or 4, it is characterised in that：The frequency modulator includes
Touching, Schmidt circuit, logical-sequential control device, data register, memory and fm voltage generator, the Schmidt
Circuit is connected with logical-sequential control device, and logical-sequential control device is connected with data register and memory respectively, the data
Register is connected with memory, and the data register is connected with fm voltage generator.
6. the system according to claim 5 for adjusting crystal oscillator frequency, it is characterised in that：The memory be it is powered can
EPROM EEPROM.
7. the system according to claim 1 for adjusting crystal oscillator frequency, it is characterised in that：The work temperature of the frequency modulator
Spend for -40 DEG C to 125 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710299275.3A CN106972839A (en) | 2017-05-02 | 2017-05-02 | A kind of system for adjusting crystal oscillator frequency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710299275.3A CN106972839A (en) | 2017-05-02 | 2017-05-02 | A kind of system for adjusting crystal oscillator frequency |
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| Publication Number | Publication Date |
|---|---|
| CN106972839A true CN106972839A (en) | 2017-07-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710299275.3A Pending CN106972839A (en) | 2017-05-02 | 2017-05-02 | A kind of system for adjusting crystal oscillator frequency |
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| Country | Link |
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| CN (1) | CN106972839A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111600570A (en) * | 2020-05-26 | 2020-08-28 | 广州彩熠灯光股份有限公司 | Pressure-controlled active crystal oscillator control device and method and stage oscillating lamp |
| CN112234979A (en) * | 2020-09-04 | 2021-01-15 | 上海鸿晔电子科技股份有限公司 | Crystal oscillator voltage-regulating frequency-modulating circuit and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4088968A (en) * | 1976-11-08 | 1978-05-09 | Rca Corporation | Frequency linearization and sensitivity equalization of a frequency modulated crystal oscillator |
| CN101090268A (en) * | 2006-06-16 | 2007-12-19 | 北京信威通信技术股份有限公司 | Method and system for regulating accuracy of crystal vibration frequency using GPS timing pulse |
| CN201374688Y (en) * | 2009-02-26 | 2009-12-30 | 南京理工海疆科技有限公司 | Device for regulating frequency of crystal oscillator in remote controlling way |
| US20140184348A1 (en) * | 2012-12-29 | 2014-07-03 | Hon Hai Precision Industry Co., Ltd. | Circuit for adjusting frequency of crystal oscillator |
-
2017
- 2017-05-02 CN CN201710299275.3A patent/CN106972839A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4088968A (en) * | 1976-11-08 | 1978-05-09 | Rca Corporation | Frequency linearization and sensitivity equalization of a frequency modulated crystal oscillator |
| CN101090268A (en) * | 2006-06-16 | 2007-12-19 | 北京信威通信技术股份有限公司 | Method and system for regulating accuracy of crystal vibration frequency using GPS timing pulse |
| CN201374688Y (en) * | 2009-02-26 | 2009-12-30 | 南京理工海疆科技有限公司 | Device for regulating frequency of crystal oscillator in remote controlling way |
| US20140184348A1 (en) * | 2012-12-29 | 2014-07-03 | Hon Hai Precision Industry Co., Ltd. | Circuit for adjusting frequency of crystal oscillator |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111600570A (en) * | 2020-05-26 | 2020-08-28 | 广州彩熠灯光股份有限公司 | Pressure-controlled active crystal oscillator control device and method and stage oscillating lamp |
| CN112234979A (en) * | 2020-09-04 | 2021-01-15 | 上海鸿晔电子科技股份有限公司 | Crystal oscillator voltage-regulating frequency-modulating circuit and method |
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Application publication date: 20170721 |
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